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<p>The pursuit of sustainable, bio-based soft materials has driven increasing interest in lipid systems capable of self-assembling into ordered nanostructures. In this work, we investigate murumuru butter (<i>Astrocaryum murumuru</i> Mart.), an Amazonian lipid resource rich in lauric and myristic acids, from a materials-science perspective. A comprehensive characterization combining GC–MS, PLM, FTIR, TG/DSC, WAXS, and low-angle XRD was performed to elucidate the relationships among composition, structure, and functional behavior. The results demonstrate that the supramolecular organization of murumuru butter is dominated by a lamellar mesophase, whose periodicity and long-range order arise intrinsically from its mixed-fatty-acid triglyceride composition. This lamellar arrangement forms spontaneously, without surfactants or external structuring agents, revealing a natural tendency toward bilayer-type organization stabilized by amphiphilic interactions. FTIR confirmed the chemical architecture of the triglycerides, while thermal analysis indicated stability up to ~266°C. Low-angle XRD identified harmonic reflections (1:2:3) characteristic of layered ordering, and WAXS corroborated molecular packing consistent with lamellar stacking. These findings highlight murumuru butter as a renewable amphiphilic material whose intrinsic molecular composition drives the formation of stable lamellar mesophases, imparting optical anisotropy, thermal robustness, and structural coherence. Beyond its potential in controlled-release systems and soft-material engineering, murumuru butter stands out as a natural model for investigating self-assembly and lamellar-phase stability in bio-inspired lipid systems.</p>

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Structural and self-assembly properties of Amazonian murumuru butter as a sustainable material

  • 期刊论文

  • 发表日期：

    2026年7月9日

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  • Querem Hapuque Felix Rebelo,
  • Wendel Clei Sousa Rodrigues,
  • Dayane Izabelita Santos Lacerda,
  • Amanda Carolline Esquerdo da Silva,
  • Júnior Avelino de Araújo,
  • Kariane Mendes Nunes

摘要

The pursuit of sustainable, bio-based soft materials has driven increasing interest in lipid systems capable of self-assembling into ordered nanostructures. In this work, we investigate murumuru butter (Astrocaryum murumuru Mart.), an Amazonian lipid resource rich in lauric and myristic acids, from a materials-science perspective. A comprehensive characterization combining GC–MS, PLM, FTIR, TG/DSC, WAXS, and low-angle XRD was performed to elucidate the relationships among composition, structure, and functional behavior. The results demonstrate that the supramolecular organization of murumuru butter is dominated by a lamellar mesophase, whose periodicity and long-range order arise intrinsically from its mixed-fatty-acid triglyceride composition. This lamellar arrangement forms spontaneously, without surfactants or external structuring agents, revealing a natural tendency toward bilayer-type organization stabilized by amphiphilic interactions. FTIR confirmed the chemical architecture of the triglycerides, while thermal analysis indicated stability up to ~266°C. Low-angle XRD identified harmonic reflections (1:2:3) characteristic of layered ordering, and WAXS corroborated molecular packing consistent with lamellar stacking. These findings highlight murumuru butter as a renewable amphiphilic material whose intrinsic molecular composition drives the formation of stable lamellar mesophases, imparting optical anisotropy, thermal robustness, and structural coherence. Beyond its potential in controlled-release systems and soft-material engineering, murumuru butter stands out as a natural model for investigating self-assembly and lamellar-phase stability in bio-inspired lipid systems.